Note: The book "Izyumsky Line" can be considered both as independent research and as continuation of the monograph "Belgorod Line" published in 1969. Izyumsky line is the strengthened line of the Russian state, postoroyenny generally in 1679-1680 at the final stage of the Russian-Turkish wars. Separate strengthenings of Izyumsky line remained up to now, the multikilometer earth shaft in Krasnogvardeisky district of the Belgorod region called by locals "The Turkish shaft" is especially allocated.
Note: The book "Izyumsky Line" can be considered both as independent research and as continuation of the monograph "Belgorod Line" published in 1969. Izyumsky line is the strengthened line of the Russian state, postoroyenny generally in 1679-1680 at the final stage of the Russian-Turkish wars. Separate strengthenings of Izyumsky line remained up to now, the multikilometer earth shaft in Krasnogvardeisky district of the Belgorod region called by locals "The Turkish shaft" is especially allocated.